Heckoprobit

[anne jagdberg]

Dear Stata Fans,

I would like to run an analysis where I examine influence factors on people being overweight (hobbies, problems smoking, drugs, emptionalsupport)

My code reads as follows:

heckoprobit overweight hobbies problems i.smoking i.drugs i.emotional, select(binge)

All variables are dichotomous. What I do not really understand is the select part of the command. What exactly is it for?
And what is the difference of this code to using

logistic overweight hobbies problems i.smoking i.drugs i.emotional binge

?

I tried to read in the forum and also the stata help document but i do not get what the select equitation is... sorry!

best and thank you
anne

[Carlo Lazzaro]

Anne:
read the explanation in Remarks and example paragrapg, -heckprobit- entry, Stata .pdf manual.

[anne jagdberg]

Hello Carlo,

thank you for your answer. I did read it but unfortunately I did not really get what the select part means in contrast to the independent variables... and why I can specify also a dependent variable in the select part.
Sorry!

Best,
Anne